Math, asked by harshitha7437, 4 months ago

Prove that cos3A/cosA -sin3A/ sin A=-2

Answers

Answered by gummadavellibhaskarr

1

Answer:

cos3A/cosA-sin3A/sinA

(4cos³A-3cosA/cosA) -(3sinA-4sin³A) /sinA

4cos²A-3-3+4sin²A

4(cos²A+sin²A) -6

4-6=-2

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